Match the entries of column I with appropriate entires of column II Each entry in column I may have one or more than one corret option from column II if the correct matches are A-p,s, B-r,C-p,q,D-s then the correctly bubbled `4xx4` matrix should be as follows:
`{:(,"column I" ,, "column II "),((A) ,"Electrode on which reduction occurs " , (p), "Anode"),((B), "Electrode on which oxidation occurs", (q), "Cathode"),((C ) ,"Electrode connected to positive pole of the battery" , (r),"Negative pole"),((D),"Electrode connected to negative pole of the battery" , (s),"positive pole" ):}`

Answer

To solve the problem of matching the entries from Column I with the appropriate entries from Column II, we need to understand the definitions and roles of the electrodes in a redox reaction.

### Step-by-Step Solution:

1. **Identify the electrodes and their functions:**
- **Electrode on which reduction occurs:** This is known as the **cathode**. Reduction is the gain of electrons, and it occurs at the cathode.
- **Electrode on which oxidation occurs:** This is known as the **anode**. Oxidation is the loss of electrons, and it occurs at the anode.

2. **Match the electrodes with the battery terminals:**
- **Electrode connected to the positive pole of the battery:** This is the **anode**. In a galvanic cell, the anode is connected to the positive terminal.
- **Electrode connected to the negative pole of the battery:** This is the **cathode**. The cathode is connected to the negative terminal.

3. **Match the terms with the correct labels:**
- For **A (Electrode on which reduction occurs)**: The correct match is **(q) Cathode**.
- For **B (Electrode on which oxidation occurs)**: The correct matches are **(p) Anode** and **(s) Positive pole**.
- For **C (Electrode connected to positive pole of the battery)**: The correct match is **(p) Anode**.
- For **D (Electrode connected to negative pole of the battery)**: The correct match is **(q) Cathode** and **(r) Negative pole**.

4. **Summarize the matches:**
- **A** → **(q) Cathode**
- **B** → **(p) Anode**, **(s) Positive pole**
- **C** → **(p) Anode**
- **D** → **(q) Cathode**, **(r) Negative pole**

### Final Matches:
- A → q
- B → p, s
- C → p
- D → q, r